e/Fire-cracked rock

Information
has gloss	eng: In archaeology, fire-cracked rock, or FCR, is rock of any type that has been altered and split by deliberate heating. It is a feature of many archaeological sites, particularly in the south-central United States. In many cases, fire-cracked rock results when stones were used to line hearths or were heated to provide a longer-lasting heat-source (similar to a modern hot water bottle).
lexicalization	eng: fire-cracked rock
instance of	c/Archaeological artefact types